<pre class="card card-block card-header">{{checkModel | json}}</pre>

<div class="btn-group">
  <label class="btn btn-primary" [(ngModel)]="checkModel.left"
         btnCheckbox tabindex="0" role="button">Left</label>
  <label class="btn btn-primary" [(ngModel)]="checkModel.middle"
         btnCheckbox tabindex="0" role="button">Middle</label>
  <label class="btn btn-primary" [(ngModel)]="checkModel.right"
         btnCheckbox tabindex="0" role="button">Right</label>
</div>
